BT Question

I have found a used BT-99 that is priced reasonably but I noticed that the break-open lever is straight and not offset to the right like the ones that I currently own. I've been told that this signals the gun in overly worn and needs rebuilt? By rebuilt, are people meaning the internal springs that sometimes need replaced or is it something more serious?

If the price is reasonable buy it. Check with a smith to see if you can just replace the lug. They can be pretty far gone and still shot good. If really bad, they sometimes open on shooting. If you can't wiggle the barrel with the gun closed you're good to go.